CVE-2025-39718 (GCVE-0-2025-39718)
Vulnerability from cvelistv5 – Published: 2025-09-05 17:21 – Updated: 2026-08-05 12:04
VLAI
EPSS
VEX
Title
vsock/virtio: Validate length in packet header before skb_put()
Summary
In the Linux kernel, the following vulnerability has been resolved:
vsock/virtio: Validate length in packet header before skb_put()
When receiving a vsock packet in the guest, only the virtqueue buffer
size is validated prior to virtio_vsock_skb_rx_put(). Unfortunately,
virtio_vsock_skb_rx_put() uses the length from the packet header as the
length argument to skb_put(), potentially resulting in SKB overflow if
the host has gone wonky.
Validate the length as advertised by the packet header before calling
virtio_vsock_skb_rx_put().
Severity
8.4 (High)
Assigner
References
7 references
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
baddcc2c71572968cdaeee1c4ab3dc0ad90fa765 , < 969b06bd8b7560efb100a34227619e7d318fbe05
(git)
Affected: 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 , < ee438c492b2e0705d819ac0e25d04fae758d8f8f (git) Affected: 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 , < faf332a10372390ce65d0b803888f4b25a388335 (git) Affected: 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 , < 676f03760ca1d69c2470cef36c44dc152494b47c (git) Affected: 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 , < 0dab92484474587b82e8e0455839eaf5ac7bf894 (git) Affected: 6.1.63 , < 6.1.149 (semver) |
guessed | |
| Linux | Linux |
Affected:
6.3
Unaffected: 0 , < 6.3 (semver) Unaffected: 6.1.149 , ≤ 6.1.* (semver) Unaffected: 6.6.103 , ≤ 6.6.* (semver) Unaffected: 6.12.44 , ≤ 6.12.* (semver) Unaffected: 6.16.4 , ≤ 6.16.* (semver) Unaffected: 6.17 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | SIMATIC CN 4100 |
Affected:
0 , < V5.0
(custom)
|
guessed |
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"id": "CVE-2025-39718",
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"product_status:first_fixed": "2",
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"product_status:known_not_affected": "317",
"product_status:recommended": "578",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-39718",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-39718.json",
"version": "56"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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